Treating rosin.



ED sTArQP- TENT I or nori. f

FRANK E. MARINER, F GULL POINT, FLOR-IDA, ASSIGNOR- TO THE PENSACOLA TAR&

TURPENTINE COMPANY, or GULL POINT,

FLOR-IDA, A CORPORATION OF FLOR-IDA.

Tan-Arms ROSIN.

No Drawing.

T 0!] Z whom it may concern Be it known that I, FRANK E. MARINER,acitizen oi? the United States, residing at Gull 1oint,.in the county ofEscambia and State of Florida, have invented a neW and usefulImprovement in Treating Rosin. of which the following is aspecification.

My invention relates to an improved treatment of frosin, or colophony,meaning the residue obtained by distilling turpentine and from which theturpentine is thus separated. for the purpose of obtaining a prodnot,which may properly be termed a rosinoid because of its physicalresemvalue rarely exceeds per cent. This acid content of rosin oil,which is the portion of the latter that combines with the milk of limeto produce the rosin soap for setting the grease. is generallyunderstood to be -abietic acid, notwitl'istanding the fact,that therosin, from which the rosin oilyis produced, and which is approximatelyall abietic acid, will 'not properly set grease,

nor does it have necessary lubricating qualities. 'It Would thereforeseem that 1n producing rosinoil by, distilling rosin, a. re-

arrangement of its molecular .structure .takes place, due to thefnery.mater al decomposition brought about by the heat; and

that in the course of this re-arrangement the 'saponifying agenttherein, believed to be abietic acid, contained in the resultant rosin"oil is rendered agreasersehthough the cent, it follows-that the,remaining per,

precisefmol'ecular structure of this, agent is not known. It j being.Zevident, ,therefore, that the only alue of rosin oilas a grease set isin' itsacid-'content-ofabout 45 per cent-,or thereabouhpf neutraloil'iswasted;

I By distilling, under' a more or lesshigli vacuum, rosin irom which theY turpentine has been thoroughly l -extracted by 'distilla;

Specification of Letters Patent.

Patented Oct. 20, 15 14:.

Application filed December 23, 1913. Serial No. 808,486.

ti'on, or with superheated steam, a peculiar distillate is producedwhich, as I have discovered, possesses superior grease-settingproperties. By distilling-such resin in a vacuum of, say, 22 inches at atemperature. between 290 C. and 310- C. the distillate contains an acidvalue of approximately 90 per cept. and this constitutes approximately90 per cent. of the rosin treated. This acid, which is apparently anisomer of abietic acid. is probably similar to the acid formed bydistilling rosin at atmospheric pressure to ,produce ordinary rosin oil,containing only about 45 per cent. of acid value, as aforesaid.Consequently, about one-half the quantity of my rosinoid product willsufiice for the grease-setting purpose in the manufacture of lubricantgreases that is required of regular first-run rosin oil.

If the rosin be distilled by the use of steam, the latter shouldpreferably be not into'the rosin in thejstill through-a. perfo ratedpipe or pipes; and the still may be additionally heated withexternally-applied fire, which, however, is not necessary, butpreferable because more economical, since it obviates the need ofcarrying highly superheated steam. Moreover, therosin can be heatedin'the still to the comparatively-low boiling point essential tocarrying it over only superheated, but should be conductedin thepresence of steam, which then becomes superheated by contact with themass of hot rosin; and the bulk' of the rosin may be dis tilled by atemperature of about 275 0., though the distillation starts at a muchlower temperature, while at that specified.

the distillation proceeds rapidly and steadily and continues until mostof the rosin has been distilled over 'in'the form of .this p eculiararticle of rosi-n'oid. The last 8 to 1 0 per cent. of the rosin,however, re quires the temperature tobe raised somewhat to carry iteven. Practically'all ofthe rosin may be distilled over by this method.

While the distiilate isthesame, Whether produced by the describedpractice in oamm or by the. use .of-superheated steam,'-of 0btainingithe .inolecular change of therosin necessary to convertthe abietic acidinto my precin t; thereby to -enhance; its chemical action with milkoflinie manufacturing grease,

at being 'less' expensive inthe mat difierences from the ordinaryrosin-product I of turpentine-distillation, in being susce reduced tothe form of tent be lower than 80 tible of chewing like chewing gum, andin remaining solid at ordinary temperatures. To possess this last-namedcharacteristic the abietic acid content should be at least about 80 percent. However, by agitating it while it is cooling after distillation,whereby it is crystals, it will remain solid at ordinary atmospherictemperatures even though the abietic acid conper cent, and thisparticularly, if from 1 to 2 per cent. of water be added to it Whileundergoing agitation, to promote the crystallization. This property ofremaining solid at ordinary temperatures affords the advantage ofenabling my improved article to be transported, like rosin, in slackcooperage without material or undesirable change in its condition, whilerosin oil requires to be shipped in tight and more expensive packages.

' What I claim'as new by Letters Patent is l. The process which consistsin distilling over rosin, from which the turpentine has previously beenseparated,

and desire to secure 1 at a temperature.

below its boiling point at atmospheric pressure, condensing thedistillate, and continu-. ing the distillation until substantially allthe rosin has been distilled over, whereby a grease-set high inabietic-acid content is produced. I

v 2. The process which consists in distilling over, with superheatedsteam, rosin, from which the turpentine has previously been separated,condensing the distillate, and continuing the distillation untilsubstantially all the rosin has been distilled over, whereby agrease-set high in abietic-acid content is produced.

3. The process which consists in over, with superheated steam at atemperature of about 275 C., rosin, from which the turpentine haspreviously been separated, raising the temperature of the steam tocomplete the distillation of substantially all the rosin, and condensingthe distillate, whereby a grease-set high in abietic-acid content isproduced.

4. As a grease-set for lubricant greases, the distillate of rosin havingan abietic-acid content of over 65 per cent.

FRANK E. MARINER.

I In presence of A. C. FISCHER, F. A. FLORLLL.

